Kang Da-hye is a long-term baeksu living an ordinary life. On the day she fails to get another full-time job, she regresses to 11 years ago. “I’m a high school student again! I have to take the SATs again and go to college! I’m really going to do well in this life.” She passed the SAT. She got into Hankuk University and got a job in the last semester. She earns money and buys stocks and coins in advance. She lives hard with that mindset, but boys keep bothering her. “Kang Dahye. I hate you the second most in our class.” Jung Eun-sung was there when I regressed. The main vocalist of a male idol group that debuted a year later. “Dahye, have you seen where Jisoo is?” Seo Jae-gyeom, her crush during that time. The illegitimate son of a chaebol whose mom worked as a helper. They’re both very handsome, What the hell! Her life is more important to her now than because her life will definitely be ruined in 11 years. But… “You know how much I like you.” “Can’t you just un-like me? I’ve done nothing wrong…” As usual, life doesn’t work out the way you think. ‘Guys, I have to study…’